After the accident, she had some difficulties _______ recalling what had happened _______ her.
A. on; to B. on; on C. in; to D. in; on
After the accident, she had some difficulties _______ recalling what had happened _______ her.
A. on; to B. on; on C. in; to D. in; on
C
have difficulty (in) doing sth.意为“做某事吃力、费力”；happen to sb.意为“发生在某人身上”。